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<blocktwosectionsix>
  <!--A3 AF Preamplifier/AGC-Squelch-->
  <Question1>1. What is the purpose of the diode network CR3, CR4 and CR8?</Question1>
  	<Choice1A>Clip unwanted noise spikes.</Choice1A>
  	<Choice1B>Reduces the gain of the receiver.</Choice1B>
  	<Choice1C>Filters out unwanted audio frequencies.</Choice1C>
  	<Choice1D>Mutes the audio output of the receiver.</Choice1D>
  	<Correct1>None</Correct1>
  <Reference1>Student Workbook Page 12, Section 3</Reference1>
  <Question2>2. What frequencies are BLOCKED by the low pass filter?</Question2>
  	<Choice2A>Greater than 3000 Hz.</Choice2A>
  	<Choice2B>Greater than 300 Hz.</Choice2B>
  	<Choice2C>Less than 3000 Hz.</Choice2C>
  	<Choice2D>Less than 300 Hz.</Choice2D>
  	<Correct2>None</Correct2>
  <Reference2>Student Workbook Page 12, Section 3</Reference2>
  <Question3>3. What is the audio frequency response of the AN/GRR–24 receiver?</Question3>
   	<Choice3A>20 Hz to 20,000 Hz</Choice3A>
  	<Choice3B>300 Hz to 3,000 Hz</Choice3B>
  	<Choice3C>300 Hz to 6,000 Hz</Choice3C>
  	<Choice3D>47 Hz to 420 Hz</Choice3D>
  	<Correct3>None</Correct3>
  <Reference3>Student Workbook Page 12, Section 3</Reference3>
  <Question4>4. What is the purpose of the audio compressor circuit?</Question4>
    <Choice4A>Clip unwanted noise spikes.</Choice4A>
  	<Choice4B>Reduces the gain of the receiver.</Choice4B>
  	<Choice4C>Filters out unwanted audio frequencies.</Choice4C>
  	<Choice4D>Maintains a constant audio output level.</Choice4D>
  	<Correct4>None</Correct4>
  <Reference4>Student Workbook Page 12, Section 3</Reference4>
  <Question5>5. The AGC voltage is used to maintain a constant</Question5>
  	<Choice5A>Receiver gain.</Choice5A>
  	<Choice5B>Audio output level.</Choice5B>
  	<Choice5C>Signal level at the antenna.</Choice5C>
  	<Choice5D>Receiver selectivity rating.</Choice5D>
  	<Correct5>None</Correct5>
  <Reference5>Student Workbook Page 12, Section 3</Reference5>
  <Question6>6. What potentiometer sets the level of the AGC voltage?</Question6>
  <Answer6>None</Answer6>
  <Reference6>Student Workbook Page 12, Section 3</Reference6>
  <Question7>7. Which component of the squelch circuit monitors the AGC voltage?</Question7>
  <Answer7>None</Answer7>
  <Reference7>Student Workbook Page 12, Section 3</Reference7>
  <Question8>8. What is the purpose of the Squelch Gate?</Question8>
  	<Choice8A>It mutes the IF amplifier.</Choice8A>
  	<Choice8B>To turned off the receiver.</Choice8B>
  	<Choice8C>It reduces the gain of the receiver.</Choice8C>
  	<Choice8D>It mutes audio output of the receiver.</Choice8D>
  	<Correct8>None</Correct8>
  <Reference8>Student Workbook Page 12, Section 3</Reference8>
  <Question9>9. Which chassis component adjusts squelch threshold?</Question9>
  	<Choice9A>A3 R32</Choice9A>
  	<Choice9B>A3 R41</Choice9B>
  	<Choice9C>R1 (chassis)</Choice9C>
  	<Choice9D>S1 (chassis)</Choice9D>
  	<Correct9>None</Correct9>
  <Reference9>Student Workbook Page 12, Section 3</Reference9>
  <Question10>10. What is meant by the phrase the receiver is squelched?</Question10>
  	<Choice10A>The receiver is turned off.</Choice10A>
  	<Choice10B>The receiver gain has been reduced.</Choice10B>
  	<Choice10C>The IF amplifier is quieted.</Choice10C>
  	<Choice10D>The audio output of the receiver is muted.</Choice10D>
  	<Correct10>None</Correct10>
  <Reference10>Student Workbook Page 12, Section 3</Reference10>
  <!--A4 Audio Frequency Amplifier Module-->
  <Question11>1. Which component adjusts the audio level at the headphone jack?</Question11>
  	<Choice11A>R2 (chassis)</Choice11A>
  	<Choice11B>R3 (chassis)</Choice11B>
  	<Choice11C>R1 (chassis)</Choice11C>
  	<Choice11D>NONE</Choice11D>
  	<Correct11>None</Correct11>
  <Reference11>Student Workbook Page 12, Section 3</Reference11>
  <Question12>2. Why are phase splitters used in the A4 module?</Question12>
  <Answer12>None</Answer12>
  <Reference12>Student Workbook Page 12, Section 3</Reference12>
  <Question13>3. What is the purpose of the output transformers used in the A4 module?</Question13>
  <Answer13>None</Answer13>
  <Reference13>Student Workbook Page 12, Section 3</Reference13>
  <Question14>4. Which front panel control is used to adjust the audio level at J2 of the receiver?</Question14>
  <Answer14>None</Answer14>
  <Reference14>Student Workbook Page 12, Section 3</Reference14>
  <Question15>5. What is the purpose of the degenerative feedback circuits in the A4 module?</Question15>
  	<Choice15A>They prevent excessive AGC voltage.</Choice15A>
  	<Choice15B>They increase the gain of the audio amplifier.</Choice15B>
  	<Choice15C>They prevent excessive gain in the audio amplifiers.</Choice15C>
  	<Choice15D>They improve frequency response of the audio amplifiers.</Choice15D>
  	<Correct15>None</Correct15>
  <Reference15>Student Workbook Page 12, Section 3</Reference15>
  <Question16>6. What test point is used to determine the condition of the secondary audio output?</Question16>
  	<Choice16A>MAIN AF, J15 pin 1</Choice16A>
  	<Choice16B>AF PREAMP, J15 pin 2</Choice16B>
  	<Choice16C>MAIN AF OUT, J2 pin C</Choice16C>
  	<Choice16D>OUTPUT, J14</Choice16D>
  	<Correct16>None</Correct16>
  <Reference16>Student Workbook Page 12, Section 3</Reference16>
  <Question17>7. What is the rated power of the main audio output?</Question17>
  	<Choice17A>1 watt at 600 ohms</Choice17A>
  	<Choice17B>100 mW at 600 ohms</Choice17B>
  	<Choice17C>600 mW at 50 ohms</Choice17C>
  	<Choice17D>1 watt at 50 ohms</Choice17D>
  	<Correct17>None</Correct17>
  <Reference17>Student Workbook Page 12, Section 3</Reference17>
</blocktwosectionsix>